Here's an update on broken links - I guess at least 50% of the links in the first post fail now (and this will just get worse over time unless we act):
Megapack
Woodsmen
Japanese
Undead
Dark Magic (No Download)
Dark Magic (No Download)
Malevolent Rising (No Download) - times out
Undersea (Aqua-Pack)
BattleGlest
Orcs (No Download)
Green Dawn Martian Invasion - 2 of 3 downloads are available (ghost town map is missing)
Animal Cruelity (No download)
Apocalyptic Dawn - 1 of 3 downloads are available (7-zip and Linux packages are missing)
Whimsical Forest
Bio, Nano, Influx (No download) - points to "Influx", a first person perspective puzzle game unrelated to *Glest*
Raiders (No Download)
Project Green (No download)
I guess keeping this list makes less and less sense. I think it would be better to keep copies of what we think should be retained (can be all that is still accessible) in multiple places, including our own hosting, which will shortly get remote backup capabilities, too. If someone is willing to go over the list and point out what should be retained, what the files should be named and how they should be titled (friendly name / description of the download), and - optionally, just where it's possible to tell (incl. reference), which license they are - I'll be happy to download them and host them on our servers, providing updates download links and instructions for mirroring them.
For now I guess we should unsticky this post since it's kind of misleading when so many links are broken. Such a list would also be better maintained on a wiki where several people can edit them.
Finally I don't agree with the quality measurements, those seem to be rather subjective (but I'm happy to discuss this separately, or not at all).